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作物学报

作物学报 ›› 2010, Vol. 36 ›› Issue (05): 788-793.doi: 10.3724/SP.J.1006.2010.00788

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

根癌农杆菌介导的转双价抗虫基因(CryIA+CpTI)苎麻

马雄风1,3,喻春明1,唐守伟1,郭三堆2,张锐2,王延周1,朱爱国1,朱四元1,熊和平1,*   

  1. 1中国农业科学院麻类研究所/农业部麻类遗传改良与工程微生物重点开放实验室,湖南长沙410205;2中国农业科学院生物技术研究所,北京100081;3中国农业科学院棉花研究所,河南安阳455000
  • 收稿日期:2009-08-26 修回日期:2009-12-21 出版日期:2010-05-12 网络出版日期:2010-03-15
  • 通讯作者: 熊和平,E-mail:ramiexhp@2118.cn;Tel:0731-88998500
  • 基金资助:

    本研究由国家"十一五"科技支撑计划项目(2006BAD06B03)和国家公益性行业(农业)科研专项项目(nyhyzx07-018)资助.

Transgenic of Ramie with Synthetic CryIA+CpTI Gene by Agrobacterium tumefaciens-Mediated

 MA Xiong-Feng1,3,YU Chun-Meng1,TANG Shou-Wei1,GUO San-Dui2,ZHANG Dui2,WANG Yan-Zhou1,SHU Ai-Guo1,SHU Si-Yuan1,XIONG He-Beng1*   

  1. 1Institute of Bast Fiber Crops,Chinese Academy of Agricultural Sciences/Key Laboratory of Genetic Improvement & Engineering Microbiology for Bast Fiber Crops,Changsha 420105,China;2Biotechnology Research Center,Chinese Academy of Agricultural Sciences,Beijing 100081 China;3Institute of Cotton Research,Chinese Academy of Agricultural Sciences,Anyang 455000,China
  • Received:2009-08-26 Revised:2009-12-21 Published:2010-05-12 Published online:2010-03-15
  • Contact: XIONG He-Ping,E-mail:ramiexhp@2118.cn;Tel:0731-88998500

PDF

1608

被引次数

9

摘要：

利用苎麻下胚轴高频再生体系，将携带人工合成的CryIA杀虫基因和CpTI基因的高效双价杀虫基因的植物表达载体pGBI4ABC转化到苎麻主栽品种中苎1号中。经根癌农杆菌侵染和共培养后，用50 mg L–1卡那霉素+ 300 mg L–1头孢霉素筛选共获得32株抗性植株; PCR检测显示26株为阳性, 占80%。Southern杂交结果证实, 外源基因已经整合到苎麻的基因组中。这项研究为最终创造兼抗鳞翅目及鞘翅目等害虫的苎麻种质材料奠定了基础。

关键词: 苎麻, 抗虫基因, 根癌农杆菌, 转基因植株

Abstract:

Ramie [Boehmeria nivea L. (Guad.)] is a perennial herbaceous plant of the urticaceae family. Ramie affected by many insect pests above and below the ground during the growing season. The pests damage has become an important factor affecting ramie yield and quality in China. Application of chemical insecticides not only is less effective and costly, but also causes environmental pollution. Development of a genetic transformation system to introduce desired genes (e.g. toxin genes) into ramie could improve its agromonic traits such as resistance to insects. The study was conducted to transfer CryIA gene and CpTI gene into the ramie variety Zhongzhu 1. The CryIA gene encodes Bt toxin protein from Bacillus thuringiensis toxinof Vitis pseudoreticulata; while, the CpTI gene encodes a cowpea trypsin inhibitor produced by Vigna unguiculata. Synthesized CryIA geneand CpTI gene were inserted into plant expression vectorpGBI4ABC whichcarried high efficient bivalent insect resistant genes. With high frequency of adventitious shoot induction and plant regeneration, ramie hypocotyls of the variety Zhongzhu 1 were transformed with Agrobacterium tumefaciens strain LB4404 harboring the plant expression vector pGBI4ABC, and then shoot buds formed from calli induced from hypocotyls were selected with the mixed solution of 50 mg L–1 Kanamycin and 300 mg L–1 Cefotaxime. The result showed that 32 Kanamycin-resistant plants were obtained, and therein 26 plants were positive in PCR test, indicating that 80% of the Kanamycin-resistant plants contain CryIA gene and CpTI gene. Southern blot and GUS analysis also verified that the foreign genes of CryIA and CpTI were successfully integrated into the genome of the transgenic plants and expressed.

Key words: Ramie, Insect resistant genes, Agrobacterium tumefaciens, Transegenetic plants

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